Natural Selection
What is a special case of natural selection?
Sexual Selection
What is the definition of mutation?
An alteration in DNA
Gene flow is the process of _______ going from one population to another.
Alleles
Does genetic drift have a greater impact on larger or smaller populations?
Smaller populations
Which of the forces adds overall variation within a population?
Mutation and gene flow
What was the name of Darwin’s book that talked about sexual selection?
The Descent of Man
True or False: All mutations lead to evolution
False
The process through which gene flow occurs.
What are the 3 types of genetic drift?
Generational, bottle neck, founder effect
Which of the forces decreases overall variation within a population?
Genetic drift and natural selection
What are the three main kinds of natural selection?
Directional, stabilizing, disruptive
What is a type of mutation?
Inversion
The process through which gene flow is cut off and members of a population stop recognizing each other as possible mates.
Speciation
The effect of genetic drift is to _____(increase or decrease) variation within a population and _____(increase or decrease) variation among populations
decrease, increase
Which of the forces increase variation among populations and decrease variation among populations?
Increase variation among populations is mutation, genetic drift, and natural selection. Decrease variation among populations is gene flow
What are the two mechanisms of sexual selection?
Male-male competition and female choice
What’s the difference between duplication mutation and deletion mutation?
A segment of a chromosome’s nucleotide sequence is inserted into a chromosome vs deletion where a segment of a chromosome’s nucleotide sequence is omitted when the chromosome is replicated
A type of speciation requiring gene flow to be cut off for many generations.
Allopatric speciation
Who coined the term genetic drift?
Sewall Wright
Which of the forces presents complexities in determining its effect on the population and why?
Natural selection because the effect is dependent on whether it is directional, stabilizing, or disruptive
Natural selection serves to _______(increase or decrease) variation in a population
Decrease
Who coined the term gene and mutation?
DeVries
Creates a new view of species formation in his book Systematics and the Origin of Species
Ernst Mayr
Genetic drift was discovered through the _____ theory of _________.
The mathematical theory of population genetics
What is the difference between the effects of the four forces among vs within populations?
Among is with other populations of the same species and within is species in the same population interacting with one another.